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Implications of adopting plane angle as a base quantity in the SI.

Quincey, P G; Brown, R J C (2016) Implications of adopting plane angle as a base quantity in the SI. Metrologia, 53 (3). pp. 998-1002.

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The treatment of angles within the SI is anomalous compared with other quantities, and there is a case for removing this anomaly by declaring plane angle to be an additional base quantity within the system. It is shown that this would bring several benefits in terms of treating angle on an equal basis with other metrics, removing potentially harmful ambiguities, and bringing SI units more in line with concepts in basic physics, but at the expense of significant upheaval to familiar equations within mathematics and physics. This paper sets out the most important of these changes so that an alternative unit system containing angle as a base quantity can be seen in the round, irrespective of whether it is ever adopted.

Item Type: Article
Keywords: radian, angle, SI units, systems of measurement units
Subjects: International
International > Metrology
Identification number/DOI: 10.1088/0026-1394/53/3/998
Last Modified: 02 Feb 2018 13:13
URI: http://eprintspublications.npl.co.uk/id/eprint/7117

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